Regular SaaS products of different kinds, cloud software, hosting software, etc. Really representative of most of the Web-enabled software out there.
For every one of them there has been an almost negligible amount of CRUD code, the meat of every one of those apps was very specific business logic. Some were also heavy on the frontend with equal amount of complexity on the backend. As a senior/staff level engineer you also have dive into other things like platform enablement, internal tooling, background jobs and data wrangling, distributed architectures, etc. which are even farther from CRUD.
For every one of them there has been an almost negligible amount of CRUD code, the meat of every one of those apps was very specific business logic. Some were also heavy on the frontend with equal amount of complexity on the backend. As a senior/staff level engineer you also have dive into other things like platform enablement, internal tooling, background jobs and data wrangling, distributed architectures, etc. which are even farther from CRUD.